import java.util.Scanner;
public class cj {
    public static void main(String[] args) {
        int i;
        double sum = 0, num;
        Scanner input = new Scanner(System.in);
        for (i = 1; i < 6; i++) {
            System.out.printf("请输入第%d门课的成绩:", i);
            num = input.nextDouble();
            sum += num;
        }
    }
}